The prefix "para-" can mean other or beside.
The prefix of perfect is per. This prefix means through or intensive. Other words that use this prefix are persecute, permit, and perspire.
It's got to be "ante" because it means before and I can't think of any other prefix that means "beginning".
The prefix "con-" means "with."
The prefix for inadequate is in-. The prefix in- means not.
The prefix is ap-. This prefix means to or toward.
The prefix of the word retroperitoneum is "retro-," which means behind, backwards, or on the other side.
The prefix is in-. This prefix means not.
The prefix is in-. This prefix means not.
The prefix is in. The prefix in- means not.
The prefix 'in-' means not.
The prefix that means "former" is "ex-."